具有对跳迁的无自旋费米子链中的双流体共存

Two-Fluid Coexistence in a Spinless Fermions Chain with Pair Hopping.

作者信息

Gotta Lorenzo, Mazza Leonardo, Simon Pascal, Roux Guillaume

机构信息

Université Paris-Saclay, CNRS, LPTMS, 91405 Orsay, France.

Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay, France.

出版信息

Phys Rev Lett. 2021 May 21;126(20):206805. doi: 10.1103/PhysRevLett.126.206805.

DOI:10.1103/PhysRevLett.126.206805

PMID:34110210

Abstract

We show that a simple one-dimensional model of spinless fermions with pair hopping displays a phase in which a Luttinger liquid of paired fermions coexists with a Luttinger liquid of unpaired fermions. Our results are based on extensive numerical density-matrix renormalization-group calculations and are supported by a two-fluid model that captures the essence of the coexistence region.

摘要

我们表明，具有对跳迁的无自旋费米子的简单一维模型展示出一个相，其中配对费米子的卢廷格液体与未配对费米子的卢廷格液体共存。我们的结果基于广泛的数值密度矩阵重整化群计算，并得到一个捕捉共存区域本质的双流体模型的支持。